If you click "tips for improving your score", it notes that your Physics (CPU) score is somewhat lower than expected.

Granted, the Health Check feature is still beta and seems to be just a tad too trigger happy in proclaiming that something may be off. In this case while it might be that the CPU score is just a bit lower than one might expect (could be, for example due to some background apps running during benchmark), the overall score is good for that system.